NEWPORT BEACH — A new smartphone app that shows users a map of more than 1,500 access points along the California coast was created with help from a tech billionaire whose elaborate wedding ran afoul of state regulators.

Napster co-founder Sean Parker agreed to help build the educational tool after he constructed a large movie-set-like site for his 2013 wedding in an ecologically sensitive area of Big Sur without proper permits. The ex-president of Facebook also paid more than $2 million in a settlement.

The app shows paths to hard-to-find beaches and gives information about amenities like parking, restrooms or fishing facilities. Users can submit photos or report violations to the commission.